نتایج جستجو برای: nh
تعداد نتایج: 14767 فیلتر نتایج به سال:
To assess differences in the receipt of preventive health services by race/ethnicity among older women with endometrial cancer enrolled in Medicare, we conducted a retrospective population-based cohort study of women diagnosed with endometrial cancer from 2001 to 2011 in the Surveillance Epidemiology and End Results (SEER)-Medicare database. Women with stage I or II endometrial cancer of epithe...
Nitrogen excreted in dairy manure can be potentially transformed and emitted as NH, which can create livestock and human respiratory problems and be an indirect source of NO. The objectives of this study were to: (i) investigate environmental factors influencing NH emissions from dairy housing; and (ii) identify key explanatory variables in the NH emissions prediction from dairy housing using a...
ABSTRACT We present the first characterization of K(+) optimization of N uptake and metabolism in an NH(4)(+)-tolerant species, tropical lowland rice (cv. IR-72). (13)N radiotracing showed that increased K(+) supply reduces futile NH(4)(+) cycling at the plasma membrane, diminishing the excessive rates of both unidirectional influx and efflux. Pharmacological testing showed that low-affinity NH...
nh-ایزوایندول-3،1(h2)-دی اون ها (فتالیمیدها)دسته مهمی از ترکیبات هتروسیکل می باشند که به علت دارا بودن خواص صنعتی و کاربردهای گسترده ی بیولوژیکی و دارویی، بسیار مورد توجه هستند.برخلاف کاربرد گسترده این ترکیبات، روش های گزارش شده موجود درمنابع برای سنتز آن ها محدود است. بنابراین، بررسی و دستیابی به روش های نوین و ساده ی سنتزی در تهیه این دسته مهم از هتروسیکل ها از اهمیت زیادی برخوردار می باشد. ...
It is proposed that the glycine precursor NH(2)CH(2)CN may be synthesised in interstellar dust clouds by the radical combination reactions NH(2)˙ + ˙CH(2)CN → NH(2)CH(2)CN (ΔG = -302 kJ mol(-1)) and/or NH(2)CH(2)˙ + ˙CN → NH(2)CH(2)CN (ΔG = -414 kJ mol(-1)). All calculations at the CCSD(T)/aug-cc-pVDZ//B3LYP/6-31+G(d) level of theory. This paper extends that concept to radical/radical coupling ...
Herein, a new catalytic nanocomposite [Co(BDC-NH 2 )-Pd NPs] composed of Co(BDC-NH ) MOF has been developed.
long range Liesbeth M. C. Janssen, Gerrit C. Groenenboom, Ad van der Avoird, Piotr S. Żuchowski, and Rafał Podeszwa Theoretical Chemistry, Institute for Molecules and Materials (IMM), Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands Department of Chemistry, Durham University, South Road, DH1 3LE, United Kingdom Institute of Chemistry, University of Silesia, Szk...
The 1.7 Å X-ray crystal structure of the B-DNA dodecamer, [d(CGCGAATTCGCG)]₂ (DDD)-bound non-covalently to a platinum(II) complex, [{Pt(NH₃)₃}₂-µ-{trans-Pt(NH₃)₂(NH₂(CH₂)₆NH₂)₂}](NO₃)₆ (1, TriplatinNC-A,) shows the trinuclear cation extended along the phosphate backbone and bridging the minor groove. The square planar tetra-am(m)ine Pt(II) units form bidentate N-O-N complexes with OP atoms, in ...
A new borohydride, [CH(3)NH(3)](+)[BH(4)](-), has been synthesized through the metathesis of CH(3)NH(3)F and NaBH(4) in methylamine. Room-temperature X-ray diffraction studies have shown that [CH(3)NH(3)](+)[BH(4)](-) adopts a tetragonal unit cell with considerable hydrogen mobility similar to that observed in NH(3)BH(3). The kinetics and thermodynamics of hydrogen release have been investigate...
NH(4)(+) acquisition by plant roots is thought to involve members of the NH(4)(+) transporter family (AMT) found in plants, yeast, bacteria, and mammals. In Arabidopsis, there are six AMT genes of which AtAMT1;1 demonstrates the highest affinity for NH(4)(+). Ammonium influx into roots and AtAMT1;1 mRNA expression levels are highly correlated diurnally and when plant nitrogen (N) status is vari...
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